ScienceBlogs is getting some back-end work done this evening, with yet another server/ MT upgrade. This is intended to help with the frequent timeout problems that bloggers and commenters have been having. Opinions differ as to whether this will fix the problem, but at least Something is Being Done.
As part of the upgrade process, comments will be shut down starting at 7pm (Eastern) this evening, lasting until whenever the upgrade is finished. We apologize for the inconvenience.